Re: [PATCH 00/30] staging: comedi: move 'struct pci_dev *' into comedi_device

[Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>]

> I suppose at a later date we could turn that into a union with a short
> name like u (so comedidev->pcidev would become something like
> comedidev->u.pcidev), which would allow us to stick a 'struct
> usb_interface *' or some other hardware device wrapper struct pointer in
> the same hole.  (Maybe 'h' for 'hardware' would be better than 'u'.)

The "usual" pattern is to make it a struct device pointer. Then you can
get to any other kind of device from it.

Alan
 
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